Lighting fixture



April 8, 1930. A. G. STE'INMAYER LIGHTING FIXTURE Fild March 26, 1927 2Sheets-Sheet 1 Alwm Gjpamma- April 8, 1930. A. G. STEINMAYER LIGHTINGFIXTURE Filed 'March' 26, 1927 2 Sheets-Sheet 2 Q A1wm E- Etammay p;

' claims, it being understood that such Patented Apr. 8,, .1930 v UNITEDSTATES PATENT OFFICE ALWIN G. STEIN'MAYER, 0F MILWAUKEE, WISCUNSIN,ASSIGNOR, BY MESNE ASSIGN- MENTS, TO LINE MATERIAL COMPANY, OF SOUTHMILWAUKEE, WISCONSIN, A GOR- ZEORATION OF DELAWARE LIGHTING FIXTUREApplication filed March 26, 1927. Serial No. 178,578.

This invention relates to street lighting fixtures and refers moreparticularly to the means for suspending the same from its supportingstructure. The voltage employed in the series system of street lightingis often greater than that which may be safely handled by the insulationof the conventional fixture, which is most frequently of dry processporcelain, and this invention has as an object the provision of a memberinserted between the fixture proper and the supporting structure and ofa material, such as wet process porcelain or the like, whereby theinsulating capacity of the fixture is increased.

Another object of this invention resides in the provision of means forincreasing the insulating capacity of a lighting fixture withoutmaterially With the above and other objects in view which will appear asthe description proceeds, my invention resides in the novelconstruction, combination and arrangement of parts substantially ashereinafter described and more particularly defined by the appendedianges in the precise embodiment of the herein disclosed invention maybe made as come within.

the scope of the claims.

In the accompanying drawings, I have illustrated three complete examplesof the physical embodiment of my invention'constructed according to thebest modes I have so far devised for the practical application of theprinciples thereof, and in which:

Figure 1 is a sectional view of a portion of a lighting fixtureillustrating my improved insulator cap applied thereto;

Figure 2 is a fragmentary view similar to Figure 1 and illustrating amodified form of my invention, and

Figure 3 is a view, partly in section and partly in elevation, means foradjustably mounting the type of receptacle illustrated in Figure 2.

Referring now more particularly toithe accompanying drawings, in whichlike numerals designate like parts throughout the several views. thenumeral 5 designates the body portion of a conventional lighting fixtureso usually formed of dry process porcelain and altering its structuraldesign.

illustrating another recessed at 6 and 7 to receive a lamp socket 8 andits mounting means consisting of a pair of spring clipsor fingers 9,between which the prongsior bayonets 10 of the socket are removablyretained. The lower portion of each. finger 9 is directed laterally andis clamped between a shoulder 11 at theinner end of the recess 6, andaterminal member 12, by bolts 13 mounted in the body portion and havingthreaded engagement with the terminal members.

Lead wires 14 enter the recess 6through apertures 15 in the wallsthereof and are electrically connected with the terminals in anyconventional manner, and the usual shade or reflector 16 is suitablymounted in the lower portion of the recess, as illustrated.

An inverted cup-shaped insulator cap 17 of wet process porcelain, orother material having like resistance value, is secured to the upperportion 18 of the dry process body member 5 by cementing or other means,and, if desired, studs 19 may be passed through aligned openings in thecap 17 and the upper portion of the body 5, to act in conjunction withthe cemented joint.

The member 17 may be provided with a lateral flange or skirt 20 ifdesired, and a hood or'canopy 21 suitably secured to the .upper portionthereof by screws or like means 22 suspends the fixture from asupporting structure, not shown.

In Figure 2 I have illustrated a modified form of my invention in whicha wet process porcelain insert 23 is secured 1n the aperture 24 of thedry process porcelain body member 5 by cementing or other suitable meansto suspend the fixture from its supporting structure, not shown. Adownwardly extended threaded stud 25 is carried by the insert 23 andprovides means for adjustabl mounting a'receptacle 26 with which the socet member 8 is removably connected and mounted in the.

upper portion of the insert 23 is a ring member 27 to provide means forsuspending the fixture from the support, not shown.

The structure depicted in Figure 3 illustrates another means foradjustably mounting the receptacle 26 and comprises a substantiallyinverted U-shaped bracket member 28 secured by screws or other means 28to the under side of the insert 23, the legs of which are longitudinallyslotted, as at 29. Suitably secured to the receptacle 26 and positioneddiametrically opposite thereof, is a pair of downwardly extended members30, which are slidably mounted between the legs of the U-shaped member28 and are adjustably secured thereto by threaded studs 31. The studsare slidably mounted in the longitudinal apertures 29 and passed throughapertures in the members 30, and have a nut 32 threaded on their outerends to,bind the members 30 to the legs of the U-shaped member in anydesired adjusted position.

WVhat I claim as my invention is:

1. The combination with a lighting fixture for use with relatively highvoltages having a housing comprising an iregularly shaped body memberwith a plurality of apertures, which member due to such irregularconfiguration is formed ofinsulating material incapable of safelywithstanding relatively high voltages, of an insulating member havingthe capacity to successfully withstand such voltages, means connectingthe latter insulating member with the bodymember of the fixture, and asupporting member for the fixture connected with the second mentionedinsulating member.

supporting member for the fixture, the body member due to its irregularconfiguration being formed of insulating material incapable of providingsafe insulation between the lamp receiving means and the supportingmember, and an insulating member having the capacity to withstandrelatively high voltages interposed between the body mem her and thesupporting member to provide the proper insulation between the lampreceiving means and the supporting member.

5. In a lighting fixture including an irregularly shaped body memberhaving a plurality of apertures and formed of insulating materialincapable of withstanding relatively high voltages, an upwardly extendedportion on said body member, an inverted wet process porcelaincup-shaped insulator cap, means mounting the cap on the upwardlyextended portion of the body member whereby the insulating capacity ofthe body member is increased, and means carried by the cap forsuspending the fixture from a support.

In testimony whereof, I hereunto afiix my signature.

ALWIN G. STEINMAYER.

2. The combination with a lighting fixture for use with relatively highvoltages having a housing comprising an irregularly shaped body memberwith a plurality of apertures, which member due to its irregularconfiguration is formed of insulating material incapable of sucessfullywithstanding relatively high voltages, of an insulating member of wetprocess porcelain and having the capacity to successfully withstand suchvoltages, means connecting the latter insulating 3 member with the bodymember of the fixture, and a'supporting member for the fixture connectedwith the second mentioned insulating member.

8. The combination with a lighting fixture for use with relatively highvoltages having a housing comprising an irregularly shaped body memberwith a plurality of apertures, which member due to its irregularconfiguration is formed of dry process porcelain which is incapable ofwithstanding relatively high voltages, of a wet process porcelaininsulating member having the capacity to successfully withstand suchhigh voltages, means connecting the latter insulating memher with thebody member of the fixture, and a supporting member for the fixtureconnected with the second mentioned insulating member.

4. The combination with a lighting fixture for use withgrelatively highvoltages having an irregularly shaped body member with' aplurality ofapertures and lamp receiving means mounted within the bodymember, of a

